Stop-valve.



No. 681,987. Patented sept. s, Ism.

F. scHuMANN. e

vsms uw; mppnenexen-med zu. 21, 1901.) (lo Model.)

UNITED STATES PATnNT QFFICE.

FRANCIS SCI-IUMANN, OF PHILADELPHIA, PENNSYLVANIA.

STO P-VALVE.

SPECIFICATION forming part of Letters Patent No. 681,987, dated September 3, 1901.

v Application nea January 21, 1901. sern1no.44,o79. (No model opened by turning the valve a quarter-turn or a fraction of a revolution.

The object of my invention is to make a valve that can be quickly operated and which I will have a positive seat against the valvecasing when the valve is closed.

My invention overcomes the objection to the ordinary plug-valve, in which a tapered plug is arranged to t a tapered seat in the casing. This form of valve is objectionable for many reasons, principally on account of the fact that it is liable to stick and is expensive to make and to ready ust when the seat is worn. This is an improvement of the ordinary screw-valve and gate-valve, as it can be quickly opened and closed with a quarterturn of the spindle.

In the accompanying drawings, Figure l is a vertical sectional View of my improved stopvalve. Fig. 2 is a sectional plan view on the line 2 2, showing lthe Valve closed. Fig. 3 is a view similar to Fig. 2, showing the valve open; and Fig. 4 is a detached perspective view of details of the invention.

A is the casing, having the inlet and outlet openings a threaded in the present instance for application to threaded pipes. This casing is bored and reamed to an even diameter throughout, forming a valve-seat for the valve.

B is a piece having a stem b extending through a stuffing-box and connected to the operating-wheel. The said piece has an open center b, through which the liquid flows when the valve is in its opened position, as shown in Fig. 3. Each side of the piece B is taered at b2,as shown clearly in Figs. 1 and hand fitting the tapered ends of the said piece are seat-plates C C, which are curved on the same radius as the bore of the casing, as shown in Fig. 2. These seat-plates have inclined ways c, corresponding to the taper of the sides b2 of the piece B, and have ribs c at each side, forming a channel in which the edges of the tion.

piece B rest, so that while the piece is free to move longitudinally in the seat-plates C the seat-plates must turn with the piece. The seat-plates C, as shown in Fig. 1, fit between a shoulder a on the base of the valve-casing and the shoulder d' on lthe cap D, which is screwed into an extension a3 of the casing, so that the seat-plates C are prevented from moving longitudinally, but can turn freely in the casing. Th'e cap D carries a stuffing-box d, through which the valve-stem b extends.

d2 is a gland fitting a stuffing-box and held in place by a head E, screwed into the cap D and confined therein by a jam-nut e. The upper end e of this head has an internal screw-thread, with which meshes the screwthread on lthe hubfof a hand-wheel F,mounted loosely on the reduced portion b3 of the valve-stem b. Between the hub f and the shoulder on the stem is a bearing-ring j, and directly above the hub of the hand-Wheel F is a handled ring G, fitting in the present instance the squared end of the stem b. The extreme end of the stem is screw-threaded, and on the screw-threaded end is a nut H. It will be noticed that the hubf of the handwheel F fits loosely between the ring G and the ring f. The ring G is provided in the present instance with two arms g; but it may be made in the form of a cap fitting over the hand-wheel F, so that when the handle is turned the ball of the hand will rest upon the cap, While the fingers will grasp the wheel F.

The operation of the Valve is as follows: The valve is closed when in the position shown in Figs. 1 and 2 and the seat-plates C C are forced tightly against the seat of the casing by forcing the Wedge-shaped piece B down after it has been turned to the closing posi- When it is wished to open the valve, the hand-Wheel F is turned sufficiently to lift the piece B, immediately relieving the seatplates C C from pressure and bringing the hub of the hand-Wheel F up in frictional contact with the ring G, and by simply continuing the movement of 'the hand-wheel F the seat-plates and the pice B will be turned to the position shown in Fig. 3 and the valve will be opened. The fluid will then flow through the central opening b' of the tapered piece B. If for any reason the piece Bwill not turn by friction, then after the pressure IOO is relieved it can be turned by the operatorV grasping the arms g of the ring G, which is positively connected to the stem of said piece. I provide stops 'i i in the bottom of the easing, against which the piece B strikes when full opened and full closed, and the rings c' c' of the scat-plates C (l have ears c2 at each end, so that they can be readily held when fitting the plates to their seats in the casing.

In some instances the bore of the valve-casing may be slightly tapered and the seatplates tapered accordingly, and my improved tapered piece may be applied to the ordinary form of plug-valve structure having a tapered bore.

In a separate application tiled by me on the 10th day of December, 1900, Serial No. 39,394, I have shown and claimed a valve structure in which the valve is made in two parts, one part arranged to move upon but turn with the other part.

I' claim as my inventionl. The combination in a stop-valve structure, of a casing, a single tapered piece having a passage-way for iiuid through it, seatplates mounted between the piece and the casing, a hand-wheel for moving said piece longitudinally and a second wheel for turning the piece, substantially as described.

2. The combination in a valve-casing havinga bore of an even diameter throughout and having inlet and outlet openings, seatplates having surfaces concentric with the bore of the casing and of such asize as to close the inlet and outlet openings, with a piece engaging the seat-plates and having a single rod attached to it, a hand-'wheel freely rotatable on the said rod constructed to longitudinally move the rod and the said piece and thereby to release the seat-plates and a second hand-wheel fixed to the rod for turning the said piece, substantially as described.

3. The combination of a valve-casing having a bore ot' an even diameter throughout, inlet and outlet openings, a cap fitted to the casing having a thread on its upper portion, seat-plates mounted between a shoulder on the casing and a cap and fitting the bore of said casing, a piece having tapered portions mounted in the seat-plates and less in height than the same, a rod for said piece, a handwheel loosely mounted thereon for moving the piece longitudinally, said wheel having threads engaging the threads on the cap, and a device Xed to the rod for turning the said piece, substantially as described.

4. The combination in a valve-casing having inlet and outlet openings, a cap for said casing, seat-plates confined between the cap and the bottom of the valve-casing and ar- .ranged to close the Openings when in one position, a piece mounted inthe casing between the seat-plates and arranged to move vertically independent of the plates but turn with them, a hand-Wheel, a screw-thread thereon, a head secured to the cap and having a screwthread with which the screw-thread on the hand-Wheel engages, and a ring for confining said hand-wheel to the stem so that on turning the hand-wheel the said piece will be raised and then turned, substantially as described.

5. The combination of acasing having inlet and outlet openings, a cap screwed into the casing, seat-plates mounted between the cap and the bottom ofthe casing, a piece arranged to slide on but turn with the seat-plates, a rod therefor, a stuffing-box in the cap, a gland therefor, a head screwed into the cap and resting upon the gland, a screw-thread in the said head, a hand-wheel having a threaded hub, the threads ot' which mesh with the threads of the head, and a ring secured to the said rod and confining the hand-Wheel thereto, substantially as described.

6. The combination in a stop-valve structure, of a casing, a tapered piece, seat-plates mounted between the said piece and the casing, means for moving the piece longitudinally and for turning the same, ribs on the said plates between which the edges of the piece rest, and ears on the ribs, substantially as described.

7. The combination in a stop-valve structure, of a casing, a single tapered piece, seatplates mounted between the said piece and the casing, means for moving the piece longitudinally and for turning the same, and stops within the casing placed to engage the seat-plates for limiting the rotary movement of the said seat-plates in either direction, substantially as described.

8. The combination in a stop-Valve structure, of a casing having inlet and outlet openings, a single tapered piece having a rod, seatplates mounted between the said piece and the casing, the piece having an open center forming a passage when the valve is turned to open, with two wheels on the said rod, one being loosely mounted thereon and constructed to move the piece longitudinally, the other being Xed to the rod outside of the first wheel and constructed to turn said piece, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANCIS SCHUMANN.

Witnesses:

WILL. A. BARR, Jos. I-I. KLEIN.

IOO 

